| With the development of China auto industry and the increasing capability of research and development,the engine power and RPM are increasing,it leads to thermal load of engine much higher.Meanwhile.Due to the fast development of AI,more and more electronic equipment are used,which has higher requirements for vehicle thermal management system.The function of vehicle thermal management system is to ensure that vehicle can work properly under specified temperature range under any environment condition,drive cycle and vehicle load.Thermal environmental adaptability is an important part of vehicle performance,which has a big impact on the economy,engine power,emission performance and comfort of vehicle.Performance optimization of thermal management and engine efficiency improvement will be an important area of future vehicle development.In order to improve the thermal management performance and to meet the thermal balance requirements under different environmental conditions and drive cycle,it is necessary to study representative roads and true drive cycle in real world,and further to setup standard drive cycles and test procedure criteria.This is very helpful to improve the adaptability of the vehicle under different thermal conditions.Starting from the significance and research status of vehicle thermal environment adaptability,this paper demonstrated the importance of typical road research.Based on the analysis of typical climate parameters,regional characteristics and road types in China,the typical test roads under different drive cycles are primarily selected.Then heat balance road tests,with 3 cars,are carried out in the cities of Lhasa,Turpan,Xining,Chongqing,Wuhan,Changsha and Guiyang etc,and the test data of cars and SUVs are obtained within 2 mouths.According to the statistics and analysis results of road test data,finally the typical roads under different test conditions are decided.The results show that the support vector machine(SVM)research method can be used to predict and analyze the road test results,and it can reduce the errors in the test process,unify the test conditions and optimize the typical road selection results to a certain extent,which provides another solution for the typical road selection research. |
